I once texted a sentence like "It reminded me of a friend whom I had got along with," and someone pointed out that I should use "a friend whom I had gotten along with."
It's a bit hard for me to comprehend their difference and how to use them correctly. As I was checking, I noticed the answer from a website (link), which sounds to me that both of them are correct, I guess. So, what are your opinions?
I know what "get along with somebody" means, but have no idea what "get" means in this phrase. I was told that with those idioms like "get along with," "come about," we can't try to figure them out by understanding the separate word itself.
The links seem to suggest: it depends on the meaning of "get". When "get" means to "become," I should say "have gotten." When "get" in a sentence means to "receive, obtain," I should say "have got", for example, I've got a cake. Am I right in understanding this way?
But I don't know what "get" means in the idiom "get along with somebody." Does it mean to "become along with somebody"? Seems that it doesn't make sense. Does it mean to "obtain along with somebody"? The rules contain so many details that I can't grasp. Maybe you can tell me the answer directly, I guess?